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August 30, 2025

What Happens When the Sun Dies

… and Other Bedtime Thoughts That’ll Ruin Your Sleep)

Good morning, you little rays of sunshine!

As I was brushing my teeth last night—pondering the usual existential dread—I stumbled upon a page about past life regression therapy training. Not for me, thanks. I can barely handle this life, let alone a rerun.

Naturally, my subconscious took that as an invitation to spiral downwards.

Did you know that in just three generations, no one will remember you existed?

Unless you’re a monarch, a war, or one of The Beatles, your legacy is basically toast.

I placed my ego gently in the bin and thought, “So what?” I don’t know who my great-grandfather was, what he did, or whether he preferred tea or coffee. Why should I be any different?

could this be my granddad

Galactic Survival for Tea Drinkers

So here I am, 6 AM, slurping tea and rubbing sleep from my eyes, asking the real questions from ChatGPT:

What happens when the Sun dies?

It’s Not a Supernova, But It’s Still Pretty Rude

Good old ChatGPT is a straight-shooter, and it didn’t hold back.

Turns out, the Sun isn’t massive enough to go out with a bang.

Instead, in about 5–6 billion years, it’ll expand into a red giant, likely engulfing Mercury, Venus, and possibly Earth.

Before that, in just ~1 billion years, it’ll boil away our oceans and atmosphere, making Earth uninhabitable.

Lovely. Here’s a British seaside “wish you were here” card …

What Happens When the Sun Dies 1

Eventually, it’ll shed its outer layers into a planetary nebula, leaving behind a white dwarf.

All the planets in our solar system will either be scorched, stripped of their atmospheres, or flung into unstable orbits. So yes, solar system planets are gone.

Where’s Elon Musk when you need him? No wait – Mars is screwed too.

Proxima Centauri: Close, But No Cigar

So where do us precious humans go? The nearest star system is Proxima Centauri, part of the Alpha Centauri star system, just 4.2 light-years away.

That’s 27.2 trillion miles – perfect for a long weekend getaway, if you’re into radiation poisoning.

It has a planet called Proxima b, sitting in the habitable zone.

Sounds promising, until you realise it orbits a red dwarf prone to violent solar flares.

Sound like a teenage niece I once had.

Basically, it’s the cosmic equivalent of booking a beach holiday during hurricane season.

We’d need serious tech to terraform Proxima b or shield life from radiation. So yes, it’s close – but not exactly cozy.

Andromeda Galaxy Collision: Bruce Willis, Take Notes

Maybe we wait for the Andromeda galaxy collision in ~4 billion years and jump ship?

What Happens When the Sun Dies 2

It won’t destroy the solar system, but it could fling us into a new orbit or eject us from the galaxy entirely.

Cosmic roulette, anyone?

Not that it matters. Earth will already be uninhabitable thanks to the Sun’s increasing heat.

So the galactic fireworks will be a show for the rocks, not the residents.

Too Long Didn’t Read for the Sleep-Deprived

~1 billion years: Earth becomes inhospitable

~4 billion years: Andromeda galaxy collision

~6 billion years: Sun becomes a white dwarf

If humanity wants to survive long-term, we’ll need to master interstellar travel, terraform a few habitable zone exoplanets, and maybe build a cozy bunker on Proxima b.

Come on Elon, get out of bed.

What Happens When the Sun Dies 3

Final Thoughts from an Old Septuagenarian

Despite all this cosmic chaos, I still have a smile on my face.

All my loved ones, friends, family, and acquaintances will live out wonderful lives. Some may even have fond memories of this old devil who had the attention-span of a knat…

Now if you’ll excuse me, I’ve got an Excel spreadsheet to open, a notebook to scribble in, and I have till lunchtime to solve exceeding the speed of light travel … then it’s down to my local bar for a few slurps.

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Dave


Dave has over 25 years’ experience as a senior project manager for multinational organisations and is passionate about helping professionals build confidence, clarity, and long-term career success. Through training, mentoring, and practical resources, he supports project managers at every stage of their journey.

David Geoffrey Litten
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